NAME
chmod - change mode
SYNOPSIS
chmod octal file ...
DESCRIPTION
The octal mode replaces the mode of each of the files. The
mode is constructed from the OR of the following modes:
4000 set user ID on execution
2000 set group ID on execution
1000 sticky bit for shared, pure-procedure programs
(see below)
0400 read by owner
0200 write by owner
0100 execute (search in directory) by owner
0070 read, write, execute (search) by group
0007 read, write, execute (search) by others
Only the owner of a file (or the super-user) may change its
mode.
If an executable file is set up for sharing (``-n'' option
of ld (I) ), then mode 1000 prevents the system from aban-
doning the swap-space image of the program-text portion of
the file when its last user terminates. Thus when the next
user of the file executes it, the text need not be read from
the file system but can simply be swapped in, saving time.
Ability to set this bit is restricted to the super-user
since swap space is consumed by the images; it is only worth
while for heavily used commands.
SEE ALSO
ls (I), chmod (II)
BUGS
1